Zoé finds that there's a certain someone who has seemingly vanished themself from society, her half-sister's former best friend, Sabrina.

Chloé is given her Miraculous permanently by Ladybug as a precaution. But Chloé's new nature may prove difficult for those around her.

Marinette and Adrien wake up in a perfect world, unrecognisabe to what it once was, where no evil stirs... expect one.